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Showing results 1 to 11 of 11 Search took 0.00 seconds. Search: Posts Made By: soes

Forum: Main CFD Forum April 26, 2016, 23:53

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Thank you for the reply. I will proceed with... Thank you for the reply. I will proceed with your first solution probably, which seems more straightforward than the others. Yes the other guys have done this with finite element method using...

Forum: Main CFD Forum April 2, 2016, 12:46

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Yes in the pdf there is an explicit scheme, but I... Yes in the pdf there is an explicit scheme, but I have also tried crank nicolson, but it had a similar behavior, limitations and problems described above.

Forum: Main CFD Forum March 31, 2016, 13:36

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes But a colleague has successfully with high... But a colleague has successfully with high resolution with finite element method has solved this PDE with no such issues that I have, and he has not examined the stability or has not found out the...

Forum: Main CFD Forum March 31, 2016, 13:28

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Then it comes again the issue, that my equation... Then it comes again the issue, that my equation is not any of the conventional PDE types. Then I should probably switch to finite element method for instance

Forum: Main CFD Forum March 31, 2016, 13:15

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Then I will as well try with a forward and... Then I will as well try with a forward and backward discretization (depending on closeness to each side) as well to see whether it fixes the problem that happens with increase in resolution.

Forum: Main CFD Forum March 31, 2016, 13:00

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes you mean a central difference might not be a good... you mean a central difference might not be a good way of discretizing a wave like equation like this? since it cannot capture instability?

Forum: Main CFD Forum March 31, 2016, 12:51

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes @mprinkey Thanks for the reply, if you have a... @mprinkey Thanks for the reply, if you have a look at my uploaded file on this post you see that I did not do any splitting and I solved the whole equation. Worth mentioning even with splitting, no...

Forum: Main CFD Forum March 31, 2016, 12:43

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes https://drive.google.com/file/d/0B4b83ymv5MKZc3ZZW... https://drive.google.com/file/d/0B4b83ymv5MKZc3ZZWm5Qb01HY28/view?usp=sharing (https://drive.google.com/file/d/0B4b83ymv5MKZc3ZZWm5Qb01HY28/view?usp=sharing) @FMDenaro...

Forum: Main CFD Forum March 30, 2016, 18:20

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Here I have attached the time evolution of the... Here I have attached the time evolution of the solution and the exact analytical expression, as you see they perfectly mach, and the other plot shows the convergence as you can see the difference...

Forum: Main CFD Forum March 30, 2016, 17:14

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Yes, I mean we have two initial conditions for... Yes, I mean we have two initial conditions for time and two boundary conditions at top and bottom, and periodic boundary condition in the xi direction, that's how it closes the equation. I did von...

Forum: Main CFD Forum March 30, 2016, 13:41

Replies: 24 Implementing Robin (Dirichlet+Neumann) boundary condition Views: 2,217 Posted By soes Implementing Robin (Dirichlet+Neumann) boundary condition Hello I have attached a description of the project I am working on. I don't get my expected results, I doubt that my way of implementation of the bottom boundary condition might not be correct.

Showing results 1 to 11 of 11

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